Originální popis anglicky:
getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent - get
protocol entry
Návod, kniha: Linux Programmer's Manual
#include <netdb.h>
struct protoent *getprotoent(void);
struct protoent *getprotobyname(const char *name);
struct protoent *getprotobynumber(int proto);
void setprotoent(int stayopen);
void endprotoent(void);
The
getprotoent() function reads the next line from the file
/etc/protocols and returns a structure
protoent containing the
broken out fields from the line. The
/etc/protocols file is opened if
necessary.
The
getprotobyname() function returns a
protoent structure for the
line from
/etc/protocols that matches the protocol name
name.
The
getprotobynumber() function returns a
protoent structure for
the line that matches the protocol number
number.
The
setprotoent() function opens and rewinds the
/etc/protocols
file. If
stayopen is true (1), then the file will not be closed between
calls to
getprotobyname() or
getprotobynumber().
The
endprotoent() function closes
/etc/protocols.
The
protoent structure is defined in
<netdb.h> as follows:
struct protoent {
char *p_name; /* official protocol name */
char **p_aliases; /* alias list */
int p_proto; /* protocol number */
}
The members of the
protoent structure are:
- p_name
- The official name of the protocol.
- p_aliases
- A zero terminated list of alternative names for the
protocol.
- p_proto
- The protocol number.
The
getprotoent(),
getprotobyname() and
getprotobynumber()
functions return the
protoent structure, or a NULL pointer if an error
occurs or the end of the file is reached.
- /etc/protocols
- protocol database file
BSD 4.3
getnetent(3),
getservent(3),
protocols(5)
